It maps to the beginning of the CPU's memory space to hand off control to the cartridge or the internal ROM. A Note on Legality
While sega_101.bin is the most common name in emulation communities, there are several regional variants: : Version 1.01 of the Japanese (NTSC-J) BIOS. sega 101 bin
: A generic name often used by some emulators that accept any regional dump. Why Do You Need It? It maps to the beginning of the CPU's
Think of it as the console's "handshake" code—the very first thing that runs when you flip the power switch. What is it? sega 101 bin
Setting up the BIOS is usually a one-time process. Here is how it works for the most popular platforms: 1. RetroArch (Beetle Saturn / Kronos Cores)